In the ‘Star Wars’ universe, ice, ocean and desert planets burst from the darkness as your ship drops out of light speed. But these worlds might be more than just science fiction. Stormtroopers in the new Star Wars film ‘Rogue One’ wade through the water of an alien ocean world. NASA scientists believe ocean worlds exist in our own Galaxy, along with many other environments. Image credit: Disney / Lucasfilm Ltd. & TM. Some of the planets...
